Mathematics, 11.07.2019 21:40 22emilyl530
The following measurements were recorded for the drying time, in hours, of a certain brand of latex paint.
3.4 2.5 4.8 2.9 3.6 2.8 3.3 5.6 3.7 2.8 4.4 4.0 5.2 3.0 4.8
assume that the measurements are a simple random sample.
(a) what is the sample size for the above sample?
(b) calculate the sample mean for these data.
(c) calculate the sample median.
(d) plot the data by way of a dot plot.
(e) compute the 20% trimmed mean for the above data set.
(f) is the sample mean for these data more or less de- scriptive as a center of location than the trimmed mean?
Answers: 2
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Unaware that 35% of the 10000 voters in his constituency support him, a politician decides to estimate his political strength. a sample of 200 voters shows that 40% support him. a. what is the population? b. what is the parameter of interest? state its value c. what is the statistics of the interest? state its value d. compare your answers in (b) and (c) is it surprising they are different? if the politician were to sample another 200 voters, which of the two numbers would most likely change? explain
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The following measurements were recorded for the drying time, in hours, of a certain brand of latex...
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